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Thread: OBDII code P0031

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06-16-2013, 08:25 AM

TRDCal

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Join Date: Jul 2011

Location: Ontario, Canada

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TRDCal

Senior Member

Join Date: Jul 2011

Location: Ontario, Canada

Posts: 1,566

Member's Picture Albums

Quote:

Originally Posted by slyangel9

I'm getting Bank 1 Sensor 1 and know that this is the drivers side O2 sensor precat on the exhaust manifold. Is this considered the upstream or downstream?

Pep Boys is showing:

Part #13354 Bosch Oxygen Sensor (Downstream)
Part #13441 Bosch Oxygen Sensor (Upstream)

Which one is it?

I would put my money on pre-cat is upstream and post cat is downstream...Not 100% sure tho

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